Scientists believe that the wheel was invented 5000 years ago. The oldest wheel known was discovered in Mesopotamia and is believed to date back 55 centuries.
The idea of wheeled transportation may have come from the use of logs for rollers, but the oldest known wheels were wooden disks.
Spoked wheels appeared about 2000 BC, when they were in use on chariots.
Later iron wheels were made to turn over greased axles which gave a very bumpy ride.
Today most wheels are made of rubber and filled with air to give a comfortable ride.
What can we expect wheels to be like in the future?
The Wheel
The idea of wheeled transportation may have come from the use of logs for rollers, but the oldest known wheels were wooden disks.
Spoked wheels appeared about 2000 BC, when they were in use on chariots.
Later iron wheels were made to turn over greased axles which gave a very bumpy ride.
Today most wheels are made of rubber and filled with air to give a comfortable ride.
What can we expect wheels to be like in the future?